Yes.
I just read through the thread, and I have to say that even though I do think Willow should have been upfront with Oz that she was seeing someone else, she was in no way obligated to tell him everything. He was the one who left, not her. I realize he was leaving to "protect" her from the wolf in him, and he needed to do some soul searching. But Oz coming back and just assuming that Willow had done nothing but sit around waiting for him was silly. I thought it was messed up, though, for her to talk all night with him and let him lay with her on her bed and stuff, without once thinking it might be giving him the wrong impression that she wanted to get back togethher.
I also think, though, that Willow was deeply confused. She was struggling with her feelings for Tara before Oz even showed up, and to throw him back into the mix didn't help anything. But one thing that has always bugged me about this debate is that Oz shouldn't have asked Xander if Willow was seeing someone new; why didn't he ask Willow herself? Because that would have been too easy I guess. But I honestly don't know if Willow would have told him because at that point, she hadn't even told Buffy and Xander yet.
I guess I can see fault on both sides of this situation, so I don't side with either of them.